Reader SDK only supports on-screen tipping. Digital receipts and tips can be
configured in Reader SDK. Tipping on printed receipts is not supported at this
time.

Reader SDK cannot issue refunds. Refunds can be issued programmatically using
the Transactions API or manually in the Square Dashboard.

Reader SDK is not supported in the Square sandbox. See Testing Mobile Apps
for testing recommendations.

Your version of Reader SDK must adhere to the Square SDK update policy. To
limit risk to developers and their users, Square enforces an
update policy for Reader SDK that requires developers to keep their version
of Reader SDK current.

License

Copyright 2018 Square Inc.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.